The present study draws attention to increasing energy efficiency in private households enabled by systematic integration of end consumers by using an innovative interface. The object of investigation is referred to technical and social requirements towards a consumer interface to present energy consumption. As the success of interfaces is a question of consumer-friendly design it was questione...

The large number and power of user interface development tools (UIDTs) has answered the question of how designers can construct user interfaces which meet increasing consumer demands. It has, however, raised a new question – which tool should they choose? Previously, little work has been done to provide an effective and systematic mechanism to enable designers to select the most appropriate UID...

The proliferation of interest in collaborative computer applications in the past decade has resulted in a corresponding increase in the interest in multiuser interfaces. The current research seeks to contribute to an understanding of the design of multiuser interfaces for a group ranking task, and to the process of design. User requirements were identified by observing groups perform the rankin...

While social activities and user requirements clearly vary across cultures, we are far from having a systematic understanding of culture’s role in the design, development and use of social technologies. This workshop will bring together a mix of HCI researchers and practitioners, social scientists and psychologists who are interested in areas of social technologies and culture, in order to (a) ...

Due to an increase in the demand of context-aware applications, there is a higher requirement for an accurate user location information. Todays mobile devices contain embedded sensors like gyroscope, accelerometer and electronic compass. Researchers are exploiting these sensors to estimate user position and location in different environments. This paper surveys the latest trends of using these ...

This paper presents a roadmap for the transition from current gadget-centric digital services towards a gadget-free services environment called the Naked world. The main idea of the Naked world is that all the services which are currently provided by gadgets will be provided by the infrastructure, thus no gadgets will be needed to use any kind of digital services. When a user in the Naked world...

Nominative Signature is a useful tool in situations where a signature has to be created jointly by two parties, a nominator (signer) and a nominee (user), while only the user can verify and prove to a third party about the validity of the signature. In this paper, we study the existing security models of nominative signature and show that though the existing models have captured the essential s...

Usually, the process of development of services available as web applications considers only functional requirements. Since, an evergrowing number of users take advantage of different kinds of communication channels and devices, this process must be revised by considering new aspects: quality of service (QoS), user profiles and technical characteristics of channels. In previous works, we propos...

In designing a video broadcasting system, the delay preference of a user is traditionally regarded as unknown. In fact, such preference can be known upon user’s arrival by employing some techniques such as i) delay-dependent charging, where users are offered different levels of pay-per-view (PPV) depending on the maximum delay they are willing to tolerate; or ii) reservation, where a user speci...

This paper proposes a dynamic Stackelberg repeated game for decentralized Device-to-Device (D2D) communications overlaying cellular communications. The proposed game aims to jointly optimize D2D user behavior via a user-in-the-loop (UIL) approach; and minimize transmit power, while maximizing packet delivery ratio (PDR) for all D2D users. The Stackelberg game architecture consists of a single l...